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|  DSH 426* l8 X( Y" h c. J# p- f/ p
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| Triple insulated windings
+ n5 i4 w0 j7 d, r | 57.9, 57.9.4
1 q3 b& n `2 e) p9 P8 l | 60601-1(ed.2);am1;am2
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Standard(s)- (year and edition):& i) H5 N( M7 F r# I( P
IEC 60601-1:1988 Ed.2 Am1+Am2
& J* ]* X! w. h' B9 w0 D2 @Sub clause(s): 57.9 57.9.4
! H& z* q8 O! F# ]0 `4 y+ n" lSheet n°: DSH-426
! u/ ]# E3 U9 e/ W5 Q* L( jSubject: Triple insulated windings+ F+ }2 H* j1 p, O
Key words: Triple, insulated, winding, transformer
4 U3 X( h: g% D |Confirmed by CTL at its 39th meeting, in Cologne; P; m( A7 M6 z$ t5 G4 v+ X
Question:
, r8 M# {" @2 Y" iMany manufacturers are using a triple insulated winding wire on a transformer, where
+ k P. P# `+ a, X. O. a, UDOUBLE, or REINFORCED INSULATION is required between the primary and the secondary
5 m0 \* ~ i) K5 `: W+ o* e iwindings. Is this permitted?: B9 j: c" b6 U5 A4 N5 V
Decision:
% B1 m2 u, `' z* h& F5 VThis is allowed, but precautions should be taken concerning possible mechanical damages to
4 X! }6 F3 [7 q$ hthe wires. Other requirements of 57.9 shall be applied.
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